| // SPDX-License-Identifier: GPL-2.0+ |
| /* |
| * Copyright (C) 2016 Oracle. All Rights Reserved. |
| * Author: Darrick J. Wong <darrick.wong@oracle.com> |
| */ |
| #ifndef __XFS_RMAP_H__ |
| #define __XFS_RMAP_H__ |
| |
| struct xfs_perag; |
| |
| static inline void |
| xfs_rmap_ino_bmbt_owner( |
| struct xfs_owner_info *oi, |
| xfs_ino_t ino, |
| int whichfork) |
| { |
| oi->oi_owner = ino; |
| oi->oi_offset = 0; |
| oi->oi_flags = XFS_OWNER_INFO_BMBT_BLOCK; |
| if (whichfork == XFS_ATTR_FORK) |
| oi->oi_flags |= XFS_OWNER_INFO_ATTR_FORK; |
| } |
| |
| static inline void |
| xfs_rmap_ino_owner( |
| struct xfs_owner_info *oi, |
| xfs_ino_t ino, |
| int whichfork, |
| xfs_fileoff_t offset) |
| { |
| oi->oi_owner = ino; |
| oi->oi_offset = offset; |
| oi->oi_flags = 0; |
| if (whichfork == XFS_ATTR_FORK) |
| oi->oi_flags |= XFS_OWNER_INFO_ATTR_FORK; |
| } |
| |
| static inline bool |
| xfs_rmap_should_skip_owner_update( |
| const struct xfs_owner_info *oi) |
| { |
| return oi->oi_owner == XFS_RMAP_OWN_NULL; |
| } |
| |
| /* Reverse mapping functions. */ |
| |
| struct xfs_buf; |
| |
| static inline __u64 |
| xfs_rmap_irec_offset_pack( |
| const struct xfs_rmap_irec *irec) |
| { |
| __u64 x; |
| |
| x = XFS_RMAP_OFF(irec->rm_offset); |
| if (irec->rm_flags & XFS_RMAP_ATTR_FORK) |
| x |= XFS_RMAP_OFF_ATTR_FORK; |
| if (irec->rm_flags & XFS_RMAP_BMBT_BLOCK) |
| x |= XFS_RMAP_OFF_BMBT_BLOCK; |
| if (irec->rm_flags & XFS_RMAP_UNWRITTEN) |
| x |= XFS_RMAP_OFF_UNWRITTEN; |
| return x; |
| } |
| |
| static inline int |
| xfs_rmap_irec_offset_unpack( |
| __u64 offset, |
| struct xfs_rmap_irec *irec) |
| { |
| if (offset & ~(XFS_RMAP_OFF_MASK | XFS_RMAP_OFF_FLAGS)) |
| return -EFSCORRUPTED; |
| irec->rm_offset = XFS_RMAP_OFF(offset); |
| irec->rm_flags = 0; |
| if (offset & XFS_RMAP_OFF_ATTR_FORK) |
| irec->rm_flags |= XFS_RMAP_ATTR_FORK; |
| if (offset & XFS_RMAP_OFF_BMBT_BLOCK) |
| irec->rm_flags |= XFS_RMAP_BMBT_BLOCK; |
| if (offset & XFS_RMAP_OFF_UNWRITTEN) |
| irec->rm_flags |= XFS_RMAP_UNWRITTEN; |
| return 0; |
| } |
| |
| static inline void |
| xfs_owner_info_unpack( |
| const struct xfs_owner_info *oinfo, |
| uint64_t *owner, |
| uint64_t *offset, |
| unsigned int *flags) |
| { |
| unsigned int r = 0; |
| |
| *owner = oinfo->oi_owner; |
| *offset = oinfo->oi_offset; |
| if (oinfo->oi_flags & XFS_OWNER_INFO_ATTR_FORK) |
| r |= XFS_RMAP_ATTR_FORK; |
| if (oinfo->oi_flags & XFS_OWNER_INFO_BMBT_BLOCK) |
| r |= XFS_RMAP_BMBT_BLOCK; |
| *flags = r; |
| } |
| |
| static inline void |
| xfs_owner_info_pack( |
| struct xfs_owner_info *oinfo, |
| uint64_t owner, |
| uint64_t offset, |
| unsigned int flags) |
| { |
| oinfo->oi_owner = owner; |
| oinfo->oi_offset = XFS_RMAP_OFF(offset); |
| oinfo->oi_flags = 0; |
| if (flags & XFS_RMAP_ATTR_FORK) |
| oinfo->oi_flags |= XFS_OWNER_INFO_ATTR_FORK; |
| if (flags & XFS_RMAP_BMBT_BLOCK) |
| oinfo->oi_flags |= XFS_OWNER_INFO_BMBT_BLOCK; |
| } |
| |
| int xfs_rmap_alloc(struct xfs_trans *tp, struct xfs_buf *agbp, |
| struct xfs_perag *pag, xfs_agblock_t bno, xfs_extlen_t len, |
| const struct xfs_owner_info *oinfo); |
| int xfs_rmap_free(struct xfs_trans *tp, struct xfs_buf *agbp, |
| struct xfs_perag *pag, xfs_agblock_t bno, xfs_extlen_t len, |
| const struct xfs_owner_info *oinfo); |
| |
| int xfs_rmap_lookup_le(struct xfs_btree_cur *cur, xfs_agblock_t bno, |
| uint64_t owner, uint64_t offset, unsigned int flags, |
| struct xfs_rmap_irec *irec, int *stat); |
| int xfs_rmap_lookup_eq(struct xfs_btree_cur *cur, xfs_agblock_t bno, |
| xfs_extlen_t len, uint64_t owner, uint64_t offset, |
| unsigned int flags, int *stat); |
| int xfs_rmap_insert(struct xfs_btree_cur *rcur, xfs_agblock_t agbno, |
| xfs_extlen_t len, uint64_t owner, uint64_t offset, |
| unsigned int flags); |
| int xfs_rmap_get_rec(struct xfs_btree_cur *cur, struct xfs_rmap_irec *irec, |
| int *stat); |
| |
| typedef int (*xfs_rmap_query_range_fn)( |
| struct xfs_btree_cur *cur, |
| const struct xfs_rmap_irec *rec, |
| void *priv); |
| |
| int xfs_rmap_query_range(struct xfs_btree_cur *cur, |
| const struct xfs_rmap_irec *low_rec, |
| const struct xfs_rmap_irec *high_rec, |
| xfs_rmap_query_range_fn fn, void *priv); |
| int xfs_rmap_query_all(struct xfs_btree_cur *cur, xfs_rmap_query_range_fn fn, |
| void *priv); |
| |
| enum xfs_rmap_intent_type { |
| XFS_RMAP_MAP, |
| XFS_RMAP_MAP_SHARED, |
| XFS_RMAP_UNMAP, |
| XFS_RMAP_UNMAP_SHARED, |
| XFS_RMAP_CONVERT, |
| XFS_RMAP_CONVERT_SHARED, |
| XFS_RMAP_ALLOC, |
| XFS_RMAP_FREE, |
| }; |
| |
| struct xfs_rmap_intent { |
| struct list_head ri_list; |
| enum xfs_rmap_intent_type ri_type; |
| int ri_whichfork; |
| uint64_t ri_owner; |
| struct xfs_bmbt_irec ri_bmap; |
| }; |
| |
| /* functions for updating the rmapbt based on bmbt map/unmap operations */ |
| void xfs_rmap_map_extent(struct xfs_trans *tp, struct xfs_inode *ip, |
| int whichfork, struct xfs_bmbt_irec *imap); |
| void xfs_rmap_unmap_extent(struct xfs_trans *tp, struct xfs_inode *ip, |
| int whichfork, struct xfs_bmbt_irec *imap); |
| void xfs_rmap_convert_extent(struct xfs_mount *mp, struct xfs_trans *tp, |
| struct xfs_inode *ip, int whichfork, |
| struct xfs_bmbt_irec *imap); |
| void xfs_rmap_alloc_extent(struct xfs_trans *tp, xfs_agnumber_t agno, |
| xfs_agblock_t bno, xfs_extlen_t len, uint64_t owner); |
| void xfs_rmap_free_extent(struct xfs_trans *tp, xfs_agnumber_t agno, |
| xfs_agblock_t bno, xfs_extlen_t len, uint64_t owner); |
| |
| void xfs_rmap_finish_one_cleanup(struct xfs_trans *tp, |
| struct xfs_btree_cur *rcur, int error); |
| int xfs_rmap_finish_one(struct xfs_trans *tp, struct xfs_rmap_intent *ri, |
| struct xfs_btree_cur **pcur); |
| |
| int xfs_rmap_lookup_le_range(struct xfs_btree_cur *cur, xfs_agblock_t bno, |
| uint64_t owner, uint64_t offset, unsigned int flags, |
| struct xfs_rmap_irec *irec, int *stat); |
| int xfs_rmap_compare(const struct xfs_rmap_irec *a, |
| const struct xfs_rmap_irec *b); |
| union xfs_btree_rec; |
| int xfs_rmap_btrec_to_irec(const union xfs_btree_rec *rec, |
| struct xfs_rmap_irec *irec); |
| int xfs_rmap_has_record(struct xfs_btree_cur *cur, xfs_agblock_t bno, |
| xfs_extlen_t len, bool *exists); |
| int xfs_rmap_record_exists(struct xfs_btree_cur *cur, xfs_agblock_t bno, |
| xfs_extlen_t len, const struct xfs_owner_info *oinfo, |
| bool *has_rmap); |
| int xfs_rmap_has_other_keys(struct xfs_btree_cur *cur, xfs_agblock_t bno, |
| xfs_extlen_t len, const struct xfs_owner_info *oinfo, |
| bool *has_rmap); |
| int xfs_rmap_map_raw(struct xfs_btree_cur *cur, struct xfs_rmap_irec *rmap); |
| |
| extern const struct xfs_owner_info XFS_RMAP_OINFO_SKIP_UPDATE; |
| extern const struct xfs_owner_info XFS_RMAP_OINFO_ANY_OWNER; |
| extern const struct xfs_owner_info XFS_RMAP_OINFO_FS; |
| extern const struct xfs_owner_info XFS_RMAP_OINFO_LOG; |
| extern const struct xfs_owner_info XFS_RMAP_OINFO_AG; |
| extern const struct xfs_owner_info XFS_RMAP_OINFO_INOBT; |
| extern const struct xfs_owner_info XFS_RMAP_OINFO_INODES; |
| extern const struct xfs_owner_info XFS_RMAP_OINFO_REFC; |
| extern const struct xfs_owner_info XFS_RMAP_OINFO_COW; |
| |
| extern struct kmem_cache *xfs_rmap_intent_cache; |
| |
| int __init xfs_rmap_intent_init_cache(void); |
| void xfs_rmap_intent_destroy_cache(void); |
| |
| #endif /* __XFS_RMAP_H__ */ |
